Joint inference of multi-channel transient surface wave method and microtremor method to investigate the structure and thickness of the overburden layer in the typical area of karst collapse
ZHANG Wei
GAN Fuping
LIANG Donghui
HAN Kai
LIU Wei
Abstract：In order to obtain the structure and thickness distribution of the overburden layer in the typical karst collapse area in large scale,multi-channel transient surface wave method and microtremor method were used to carry out field survey in the typical karst collapse area of Dongquan commune in Liucheng country, Liuzhou city.Based on the relationship between the characteristic frequency and the thickness of the forma-tion extracted by the microtremor method,combined with the existing borehole data,the functional relation-ship between the thickness of the covering layer and the characteristic frequency is obtained and the thickness distribution of the overburden layer can be derived.The shear wave velocity distribution of the overburden layer was obtained from the dispersion characteristics of the surface wave,based on which the structural dis-tribution of the overburden layer can be derived.With the structure and thickness distribution of cover layer, four local faults or dissolution trenches in the survey area were inferred.The study shows that the structure and thickness distribution of the overburden layer can be effectively deduced by using the characteristic fre-quency of microtremor and the dispersion characteristics of the surface wave.
Keywords：multi-channel transient surface wave methodmicrotremor methodkarst collapseoverburden layercharacteristic frequency
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 272-279 )